Efficient dynamic channeliser based on nonuniform filter banks
Bing Li, Lindong Ge, Jin Quan Zheng · European Transactions on Telecommunications · 2007
Abstract In the multi‐standard communications systems, the intermediate frequency (IF) signal usually consists of several subband signals with nonequal bandwidths and arbitrary band locations, and in some special cases the number, location and bandwidth of the subband signal are dynamically changeable during receiving. This paper presents an efficient architecture based on nonuniform filter banks to channelise these signals. The nonuniform filter bank can be constructed by directly merging the relevant uniform cosine‐modulated filter bank (CMFB) according to the nonuniform matrix. The whole filter design can be boiled down to design a prototype filter that meets some constraints. The proposed structure can be optimised to reduce the computational complexity using the relationships among different decimation factors of different subband signals. Along with signals dynamically changing, new channelisation can be implemented as long as updating the nonuniform matrix. New structure is provided with low cost in hardware and high flexibility. Simulation results are also presented to illustrate its feasibility. Copyright © 2007 John Wiley & Sons, Ltd.